fix accepted_project_invitation emailer
fix accepted_project_invitation emailer

nfredrik/teambox,rahouldatta/teambox,teambox/teambox,irfanah/teambox,vveliev/teambox,irfanah/teambox,teambox/teambox,rahouldatta/teambox,vveliev/teambox,vveliev/teambox,irfanah/teambox,irfanah/teambox,nfredrik/teambox,vveliev/teambox,nfredrik/teambox,nfredrik/teambox,rahouldatta/teambox,teambox/teambox